-module(olive).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([main/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

-file("src/olive.gleam", 39).
-spec listen_to_file_changes(
    gleam@erlang@process:subject(olive@watcher:message()),
    olive@client_registry:client_registry()
) -> any().
listen_to_file_changes(Subject, Clients) ->
    Msg = gleam_erlang_ffi:'receive'(Subject),
    case Msg of
        files_changed ->
            case olive@server_run:reload_server_code() of
                {ok, _} ->
                    olive@client_registry:trigger(Clients);

                {error, Msg@1} ->
                    olive@logging:error(Msg@1)
            end
    end,
    listen_to_file_changes(Subject, Clients).

-file("src/olive.gleam", 26).
-spec run_olive(olive@config:config()) -> any().
run_olive(Config) ->
    olive@logging:configure_logs(erlang:element(5, Config)),
    Clients = olive@client_registry:start(),
    Subject = gleam@erlang@process:new_subject(),
    _assert_subject = olive@watcher:start(Subject),
    {ok, _} = case _assert_subject of
        {ok, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                        value => _assert_fail,
                        module => <<"olive"/utf8>>,
                        function => <<"run_olive"/utf8>>,
                        line => 31})
    end,
    _ = olive@server_run:start_server(),
    _assert_subject@1 = olive@proxy:start_http(Config, Clients),
    {ok, _} = case _assert_subject@1 of
        {ok, _} -> _assert_subject@1;
        _assert_fail@1 ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                        value => _assert_fail@1,
                        module => <<"olive"/utf8>>,
                        function => <<"run_olive"/utf8>>,
                        line => 34})
    end,
    listen_to_file_changes(Subject, Clients).

-file("src/olive.gleam", 16).
?DOC(
    " Process is as follow:\n"
    " - Start a client registry\n"
    " - Start watcher, giving it a subject we will listen to.\n"
    " - Every time watcher sends us a message:\n"
    "   - Reload server code\n"
    "   - Send reload message to clients\n"
).
-spec main() -> nil.
main() ->
    Config = olive@config:parse_from_cli(),
    case Config of
        {some, Config@1} ->
            run_olive(Config@1);

        none ->
            nil
    end.